jEPlus + TRNSYS
[This page is now redundant as TRNSYS support is released with jEPlus v1.3]
Due to demand for using jEPlus functions with TRNSYS simulations, we have started working on developing a jEPlus-style wrapper for TRNSYS.
TRNSYS Overview
TRNSYS is a transient systems simulation program with a modular structure. It recognizes a system description language in which the user specifies the components that constitute the system and the manner in which they are connected. The TRNSYS library includes many of the components commonly found in thermal and electrical energy systems, as well as component routines to handle input of weather data or other time-dependent forcing functions and output of simulation results. The modular nature of TRNSYS gives the program tremendous flexibility, and facilitates the addition to the program of mathematical models not included in the standard TRNSYS library. TRNSYS is well suited to detailed analyses of any system whose behaviour is dependent on the passage of time. TRNSYS has become reference software for researchers and engineers around the world. Main applications include: solar systems (solar thermal and photovoltaic systems), low energy buildings and HVAC systems, renewable energy systems, cogeneration, fuel cells.
TRNSYS Project
TRNSYS consists of a suite of programs: The TRNSYS Simulation Studio, the simulation engine (TRNDll.dll) and its executable (TRNExe.exe), the Building input data visual interface (TRNBuild.exe), and the Editor used to create stand-alone redistributable programs known as TRNSED applications (TRNEdit.exe).
A TRNSYS project is typically setup by connecting components graphically in the Simulation Studio. Each Type of component is described by a mathematical model in the TRNSYS simulation engine and has a set of matching Proforma's in the Simulation Studio The proforma has a black-box description of a component: inputs, outputs, parameters, etc. The Simulation Studio generates a text input file for the TRNSYS simulation engine. That input file is referred to as the deck file.
Model Structure
TRNSYS is a modular program in which models of individual energy system components are written and then connected together to form an overall system model. These models can be based on fundamental principles or formulated from empirical performance data for a given system component. The component inputs and outputs are linked together in a TRNSYS deck file (.dck) to form a large set of algebraic and differential equations describing the entire system required for simulation. TRNSYS decks can also be formatted as TRNSED files (.trd). A TRNSED file is a user-friendly front-end for the TRNSYS deck which allows a non-expert to operate the simulation without knowledge of the details of the syntax required by TRNSYS.
Running TRNSYS
TRNSYS must be properly installed, it means that: “Exe” folder, “UserLib” folder and “user17.id” file have to work correctly and are located in the same directory (or folder) for each project.
It is possible to run TRNSYS in batch mode with the command line:
”..\Exe\TRNExe.exe” “model.dck” /h
or
”..\Exe\TRNExe.exe” “model.trd” /h
The ”/h” switch makes TRNSYS completely invisible (you can check that it is running by launching Windows' task manager and look for a process called TRNExe).
Edit Deck file(s)
Output file(s)
User specified file name(s) using a 'printer' type. Format is user-defined; CSV format is preferred.
a very useful tool that allows you to view dozens of output variables during a simulation.
This document may contain valuable information proprietary to CleanTech Analytics which is private and confidential. It may not be shared, copied, stored or transmitted in any form without the prior written consent of CleanTech Analytics
You could also use free optimization tool 'GenOpt' which performs
parametric simulations. I attached you some work that can help you at
the start.
Regards,
Miroslava Kavgic
On 1 August 2012 01:00, CleanTech Analytics
--<jeremiah@cleantechanalytics.com> wrote:
> jE+ could do this.
>
> Sent from my Windows Phone
> From: Ivan Flores Abascal
> Sent: 7/31/2012 3:05 PM
> To: trnsys-users@cae.wisc.edu
> Subject: [TRNSYS-users] Parametric simulation varying wall properties
> Dear Trnsys users:
>
> I need to make a parametric simulation of a building, varying the heat
> capacity of one of its walls. Is it possible to do in a automatic way?
> for example, modifying or editing some file as can be made with
> TRNEdit if you want to run several weather files.
>
> If possible, how can I do?
>
> Thanks in advance
>
>
> Ivan Flores
>
> Lecturer of Heat Transfer
> Department of Thermal Engineering
> Engineering School of Bilbao, UPV/EHU
> Address: E.T.S. de Ingeniería de Bilbao, Alameda Urquijo s/n, 48013
> BILBAO, (Spain)
> Phone: +34 946018214 Fax: +34 946014283
>
>
>
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users@cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users@cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users
Miroslava Kavgic Dipling, MSc
PhD Candidate
Bartlett School of Graduate Studies
University College London (UCL)
Central House
14 Upper Woburn Place
London WC1H 0NN UK
E-mail:miroslava.kavgic@gmail.com
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TRNSYS-users mailing list
TRNSYS-users@cae.wisc.edu
https://mailman.cae.wisc.edu/listinfo/trnsys-users